source3/modules/vfs_glusterfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Wrap GlusterFS GFAPI calls in vfs functions.
   5
   6    Copyright (c) 2013 Anand Avati <avati@redhat.com>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /**
  23  * @file   vfs_glusterfs.c
  24  * @author Anand Avati <avati@redhat.com>
  25  * @date   May 2013
  26  * @brief  Samba VFS module for glusterfs
  27  *
  28  * @todo
  29  *   - sendfile/recvfile support
  30  *
  31  * A Samba VFS module for GlusterFS, based on Gluster's libgfapi.
  32  * This is a "bottom" vfs module (not something to be stacked on top of
  33  * another module), and translates (most) calls to the closest actions
  34  * available in libgfapi.
  35  *
  36  */
  37
  38 #include "includes.h"
  39 #include "smbd/smbd.h"
  40 #include <stdio.h>
  41 #include <glusterfs/api/glfs.h>
  42 #include "lib/util/dlinklist.h"
  43 #include "lib/util/tevent_unix.h"
  44 #include "smbd/globals.h"
  45 #include "lib/util/sys_rw.h"
  46 #include "smbprofile.h"
  47 #include "modules/posixacl_xattr.h"
  48
  49 #define DEFAULT_VOLFILE_SERVER "localhost"
  50 #define GLUSTER_NAME_MAX 255
  51
  52 static int read_fd = -1;
  53 static int write_fd = -1;
  54 static struct tevent_fd *aio_read_event = NULL;
  55
  56 /**
  57  * Helper to convert struct stat to struct stat_ex.
  58  */
  59 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
  60 {
  61         ZERO_STRUCTP(dst);
  62
  63         dst->st_ex_dev = src->st_dev;
  64         dst->st_ex_ino = src->st_ino;
  65         dst->st_ex_mode = src->st_mode;
  66         dst->st_ex_nlink = src->st_nlink;
  67         dst->st_ex_uid = src->st_uid;
  68         dst->st_ex_gid = src->st_gid;
  69         dst->st_ex_rdev = src->st_rdev;
  70         dst->st_ex_size = src->st_size;
  71         dst->st_ex_atime.tv_sec = src->st_atime;
  72         dst->st_ex_mtime.tv_sec = src->st_mtime;
  73         dst->st_ex_ctime.tv_sec = src->st_ctime;
  74         dst->st_ex_btime.tv_sec = src->st_mtime;
  75         dst->st_ex_blksize = src->st_blksize;
  76         dst->st_ex_blocks = src->st_blocks;
  77 #ifdef STAT_HAVE_NSEC
  78         dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
  79         dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
  80         dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
  81         dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
  82 #endif
  83 }
  84
  85 /* pre-opened glfs_t */
  86
  87 static struct glfs_preopened {
  88         char *volume;
  89         char *connectpath;
  90         glfs_t *fs;
  91         int ref;
  92         struct glfs_preopened *next, *prev;
  93 } *glfs_preopened;
  94
  95
  96 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
  97 {
  98         struct glfs_preopened *entry = NULL;
  99
 100         entry = talloc_zero(NULL, struct glfs_preopened);
 101         if (!entry) {
 102                 errno = ENOMEM;
 103                 return -1;
 104         }
 105
 106         entry->volume = talloc_strdup(entry, volume);
 107         if (!entry->volume) {
 108                 talloc_free(entry);
 109                 errno = ENOMEM;
 110                 return -1;
 111         }
 112
 113         entry->connectpath = talloc_strdup(entry, connectpath);
 114         if (entry->connectpath == NULL) {
 115                 talloc_free(entry);
 116                 errno = ENOMEM;
 117                 return -1;
 118         }
 119
 120         entry->fs = fs;
 121         entry->ref = 1;
 122
 123         DLIST_ADD(glfs_preopened, entry);
 124
 125         return 0;
 126 }
 127
 128 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
 129 {
 130         struct glfs_preopened *entry = NULL;
 131
 132         for (entry = glfs_preopened; entry; entry = entry->next) {
 133                 if (strcmp(entry->volume, volume) == 0 &&
 134                     strcmp(entry->connectpath, connectpath) == 0)
 135                 {
 136                         entry->ref++;
 137                         return entry->fs;
 138                 }
 139         }
 140
 141         return NULL;
 142 }
 143
 144 static void glfs_clear_preopened(glfs_t *fs)
 145 {
 146         struct glfs_preopened *entry = NULL;
 147
 148         for (entry = glfs_preopened; entry; entry = entry->next) {
 149                 if (entry->fs == fs) {
 150                         if (--entry->ref)
 151                                 return;
 152
 153                         DLIST_REMOVE(glfs_preopened, entry);
 154
 155                         glfs_fini(entry->fs);
 156                         talloc_free(entry);
 157                 }
 158         }
 159 }
 160
 161 static int vfs_gluster_set_volfile_servers(glfs_t *fs,
 162                                            const char *volfile_servers)
 163 {
 164         char *server = NULL;
 165         size_t server_count = 0;
 166         size_t server_success = 0;
 167         int   ret = -1;
 168         TALLOC_CTX *frame = talloc_stackframe();
 169
 170         DBG_INFO("servers list %s\n", volfile_servers);
 171
 172         while (next_token_talloc(frame, &volfile_servers, &server, " \t")) {
 173                 char *transport = NULL;
 174                 char *host = NULL;
 175                 int   port = 0;
 176
 177                 server_count++;
 178                 DBG_INFO("server %zu %s\n", server_count, server);
 179
 180                 /* Determine the transport type */
 181                 if (strncmp(server, "unix+", 5) == 0) {
 182                         port = 0;
 183                         transport = talloc_strdup(frame, "unix");
 184                         if (!transport) {
 185                                 errno = ENOMEM;
 186                                 goto out;
 187                         }
 188                         host = talloc_strdup(frame, server + 5);
 189                         if (!host) {
 190                                 errno = ENOMEM;
 191                                 goto out;
 192                         }
 193                 } else {
 194                         char *p = NULL;
 195                         char *port_index = NULL;
 196
 197                         if (strncmp(server, "tcp+", 4) == 0) {
 198                                 server += 4;
 199                         }
 200
 201                         /* IPv6 is enclosed in []
 202                          * ':' before ']' is part of IPv6
 203                          * ':' after  ']' indicates port
 204                          */
 205                         p = server;
 206                         if (server[0] == '[') {
 207                                 server++;
 208                                 p = index(server, ']');
 209                                 if (p == NULL) {
 210                                         /* Malformed IPv6 */
 211                                         continue;
 212                                 }
 213                                 p[0] = '\0';
 214                                 p++;
 215                         }
 216
 217                         port_index = index(p, ':');
 218
 219                         if (port_index == NULL) {
 220                                 port = 0;
 221                         } else {
 222                                 port = atoi(port_index + 1);
 223                                 port_index[0] = '\0';
 224                         }
 225                         transport = talloc_strdup(frame, "tcp");
 226                         if (!transport) {
 227                                 errno = ENOMEM;
 228                                 goto out;
 229                         }
 230                         host = talloc_strdup(frame, server);
 231                         if (!host) {
 232                                 errno = ENOMEM;
 233                                 goto out;
 234                         }
 235                 }
 236
 237                 DBG_INFO("Calling set volfile server with params "
 238                          "transport=%s, host=%s, port=%d\n", transport,
 239                           host, port);
 240
 241                 ret = glfs_set_volfile_server(fs, transport, host, port);
 242                 if (ret < 0) {
 243                         DBG_WARNING("Failed to set volfile_server "
 244                                     "transport=%s, host=%s, port=%d (%s)\n",
 245                                     transport, host, port, strerror(errno));
 246                 } else {
 247                         server_success++;
 248                 }
 249         }
 250
 251 out:
 252         if (server_count == 0) {
 253                 ret = -1;
 254         } else if (server_success < server_count) {
 255                 DBG_WARNING("Failed to set %zu out of %zu servers parsed\n",
 256                             server_count - server_success, server_count);
 257                 ret = 0;
 258         }
 259
 260         TALLOC_FREE(frame);
 261         return ret;
 262 }
 263
 264 /* Disk Operations */
 265
 266 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 267                                const char *service,
 268                                const char *user)
 269 {
 270         const char *volfile_servers;
 271         const char *volume;
 272         char *logfile;
 273         int loglevel;
 274         glfs_t *fs = NULL;
 275         TALLOC_CTX *tmp_ctx;
 276         int ret = 0;
 277
 278         tmp_ctx = talloc_new(NULL);
 279         if (tmp_ctx == NULL) {
 280                 ret = -1;
 281                 goto done;
 282         }
 283         logfile = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn), "glusterfs",
 284                                        "logfile", NULL);
 285
 286         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 287
 288         volfile_servers = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn),
 289                                                "glusterfs", "volfile_server",
 290                                                NULL);
 291         if (volfile_servers == NULL) {
 292                 volfile_servers = DEFAULT_VOLFILE_SERVER;
 293         }
 294
 295         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 296                                       NULL);
 297         if (volume == NULL) {
 298                 volume = service;
 299         }
 300
 301         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 302         if (fs) {
 303                 goto done;
 304         }
 305
 306         fs = glfs_new(volume);
 307         if (fs == NULL) {
 308                 ret = -1;
 309                 goto done;
 310         }
 311
 312         ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
 313         if (ret < 0) {
 314                 DBG_ERR("Failed to set volfile_servers from list %s\n",
 315                         volfile_servers);
 316                 goto done;
 317         }
 318
 319         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 320                                      "true");
 321         if (ret < 0) {
 322                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 323                 goto done;
 324         }
 325
 326
 327         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 328                                      "snapdir-entry-path",
 329                                      handle->conn->connectpath);
 330         if (ret < 0) {
 331                 DEBUG(0, ("%s: Failed to set xlator option:"
 332                           " snapdir-entry-path\n", volume));
 333                 goto done;
 334         }
 335
 336         ret = glfs_set_logging(fs, logfile, loglevel);
 337         if (ret < 0) {
 338                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 339                           volume, logfile, loglevel));
 340                 goto done;
 341         }
 342
 343         ret = glfs_init(fs);
 344         if (ret < 0) {
 345                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 346                           volume, strerror(errno)));
 347                 goto done;
 348         }
 349
 350         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 351         if (ret < 0) {
 352                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 353                           volume, strerror(errno)));
 354                 goto done;
 355         }
 356
 357         /*
 358          * The shadow_copy2 module will fail to export subdirectories
 359          * of a gluster volume unless we specify the mount point,
 360          * because the detection fails if the file system is not
 361          * locally mounted:
 362          * https://bugzilla.samba.org/show_bug.cgi?id=13091
 363          */
 364         lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
 365
 366         /*
 367          * Unless we have an async implementation of getxattrat turn this off.
 368          */
 369         lp_do_parameter(SNUM(handle->conn), "smbd:async dosmode", "false");
 370
 371 done:
 372         if (ret < 0) {
 373                 if (fs)
 374                         glfs_fini(fs);
 375         } else {
 376                 DBG_ERR("%s: Initialized volume from servers %s\n",
 377                         volume, volfile_servers);
 378                 handle->data = fs;
 379         }
 380         talloc_free(tmp_ctx);
 381         return ret;
 382 }
 383
 384 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 385 {
 386         glfs_t *fs = NULL;
 387
 388         fs = handle->data;
 389
 390         glfs_clear_preopened(fs);
 391 }
 392
 393 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 394                                 const struct smb_filename *smb_fname,
 395                                 uint64_t *bsize_p,
 396                                 uint64_t *dfree_p,
 397                                 uint64_t *dsize_p)
 398 {
 399         struct statvfs statvfs = { 0, };
 400         int ret;
 401
 402         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 403         if (ret < 0) {
 404                 return -1;
 405         }
 406
 407         if (bsize_p != NULL) {
 408                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 409         }
 410         if (dfree_p != NULL) {
 411                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 412         }
 413         if (dsize_p != NULL) {
 414                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 415         }
 416
 417         return (uint64_t)statvfs.f_bavail;
 418 }
 419
 420 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 421                                 const struct smb_filename *smb_fname,
 422                                 enum SMB_QUOTA_TYPE qtype,
 423                                 unid_t id,
 424                                 SMB_DISK_QUOTA *qt)
 425 {
 426         errno = ENOSYS;
 427         return -1;
 428 }
 429
 430 static int
 431 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 432                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 433 {
 434         errno = ENOSYS;
 435         return -1;
 436 }
 437
 438 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 439                                 const struct smb_filename *smb_fname,
 440                                 struct vfs_statvfs_struct *vfs_statvfs)
 441 {
 442         struct statvfs statvfs = { 0, };
 443         int ret;
 444
 445         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 446         if (ret < 0) {
 447                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 448                           smb_fname->base_name, strerror(errno)));
 449                 return -1;
 450         }
 451
 452         ZERO_STRUCTP(vfs_statvfs);
 453
 454         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 455         vfs_statvfs->BlockSize = statvfs.f_bsize;
 456         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 457         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 458         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 459         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 460         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 461         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 462         vfs_statvfs->FsCapabilities =
 463             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 464
 465         return ret;
 466 }
 467
 468 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 469                                             enum timestamp_set_resolution *p_ts_res)
 470 {
 471         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 472
 473 #ifdef HAVE_GFAPI_VER_6
 474         caps |= FILE_SUPPORTS_SPARSE_FILES;
 475 #endif
 476
 477 #ifdef STAT_HAVE_NSEC
 478         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 479 #endif
 480
 481         return caps;
 482 }
 483
 484 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 485                                 const struct smb_filename *smb_fname,
 486                                 const char *mask,
 487                                 uint32_t attributes)
 488 {
 489         glfs_fd_t *fd;
 490
 491         fd = glfs_opendir(handle->data, smb_fname->base_name);
 492         if (fd == NULL) {
 493                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 494                           smb_fname->base_name, strerror(errno)));
 495         }
 496
 497         return (DIR *) fd;
 498 }
 499
 500 static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
 501                                          files_struct *fsp)
 502 {
 503         glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 504         if (glfd == NULL) {
 505                 DBG_INFO("Failed to fetch fsp extension\n");
 506                 return NULL;
 507         }
 508         if (*glfd == NULL) {
 509                 DBG_INFO("Empty glfs_fd_t pointer\n");
 510                 return NULL;
 511         }
 512
 513         return *glfd;
 514 }
 515
 516 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 517                                   files_struct *fsp, const char *mask,
 518                                   uint32_t attributes)
 519 {
 520         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 521         if (glfd == NULL) {
 522                 DBG_ERR("Failed to fetch gluster fd\n");
 523                 return NULL;
 524         }
 525
 526         return (DIR *)glfd;
 527 }
 528
 529 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 530 {
 531         return glfs_closedir((void *)dirp);
 532 }
 533
 534 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 535                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 536 {
 537         static char direntbuf[512];
 538         int ret;
 539         struct stat stat;
 540         struct dirent *dirent = 0;
 541
 542         if (sbuf != NULL) {
 543                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 544                                          &dirent);
 545         } else {
 546                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 547         }
 548
 549         if ((ret < 0) || (dirent == NULL)) {
 550                 return NULL;
 551         }
 552
 553         if (sbuf != NULL) {
 554                 smb_stat_ex_from_stat(sbuf, &stat);
 555         }
 556
 557         return dirent;
 558 }
 559
 560 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 561 {
 562         return glfs_telldir((void *)dirp);
 563 }
 564
 565 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 566                                 long offset)
 567 {
 568         glfs_seekdir((void *)dirp, offset);
 569 }
 570
 571 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 572 {
 573         glfs_seekdir((void *)dirp, 0);
 574 }
 575
 576 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle,
 577                              const struct smb_filename *smb_fname,
 578                              mode_t mode)
 579 {
 580         return glfs_mkdir(handle->data, smb_fname->base_name, mode);
 581 }
 582
 583 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle,
 584                         const struct smb_filename *smb_fname)
 585 {
 586         return glfs_rmdir(handle->data, smb_fname->base_name);
 587 }
 588
 589 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 590                             struct smb_filename *smb_fname, files_struct *fsp,
 591                             int flags, mode_t mode)
 592 {
 593         glfs_fd_t *glfd;
 594         glfs_fd_t **p_tmp;
 595
 596         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 597         if (p_tmp == NULL) {
 598                 errno = ENOMEM;
 599                 return -1;
 600         }
 601
 602         if (flags & O_DIRECTORY) {
 603                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 604         } else if (flags & O_CREAT) {
 605                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 606                                   mode);
 607         } else {
 608                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 609         }
 610
 611         if (glfd == NULL) {
 612                 /* no extension destroy_fn, so no need to save errno */
 613                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 614                 return -1;
 615         }
 616
 617         *p_tmp = glfd;
 618         /* An arbitrary value for error reporting, so you know its us. */
 619         return 13371337;
 620 }
 621
 622 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 623                              files_struct *fsp)
 624 {
 625         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 626         if (glfd == NULL) {
 627                 DBG_ERR("Failed to fetch gluster fd\n");
 628                 return -1;
 629         }
 630
 631         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 632         return glfs_close(glfd);
 633 }
 634
 635 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 636                                  files_struct *fsp, void *data, size_t n,
 637                                  off_t offset)
 638 {
 639         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 640         if (glfd == NULL) {
 641                 DBG_ERR("Failed to fetch gluster fd\n");
 642                 return -1;
 643         }
 644
 645 #ifdef HAVE_GFAPI_VER_7_6
 646         return glfs_pread(glfd, data, n, offset, 0, NULL);
 647 #else
 648         return glfs_pread(glfd, data, n, offset, 0);
 649 #endif
 650 }
 651
 652 struct glusterfs_aio_state;
 653
 654 struct glusterfs_aio_wrapper {
 655         struct glusterfs_aio_state *state;
 656 };
 657
 658 struct glusterfs_aio_state {
 659         ssize_t ret;
 660         struct tevent_req *req;
 661         bool cancelled;
 662         struct vfs_aio_state vfs_aio_state;
 663         struct timespec start;
 664 };
 665
 666 static int aio_wrapper_destructor(struct glusterfs_aio_wrapper *wrap)
 667 {
 668         if (wrap->state != NULL) {
 669                 wrap->state->cancelled = true;
 670         }
 671
 672         return 0;
 673 }
 674
 675 /*
 676  * This function is the callback that will be called on glusterfs
 677  * threads once the async IO submitted is complete. To notify
 678  * Samba of the completion we use a pipe based queue.
 679  */
 680 #ifdef HAVE_GFAPI_VER_7_6
 681 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret,
 682                                struct glfs_stat *prestat,
 683                                struct glfs_stat *poststat,
 684                                void *data)
 685 #else
 686 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret, void *data)
 687 #endif
 688 {
 689         struct glusterfs_aio_state *state = NULL;
 690         int sts = 0;
 691         struct timespec end;
 692
 693         state = (struct glusterfs_aio_state *)data;
 694
 695         PROFILE_TIMESTAMP(&end);
 696
 697         if (ret < 0) {
 698                 state->ret = -1;
 699                 state->vfs_aio_state.error = errno;
 700         } else {
 701                 state->ret = ret;
 702         }
 703         state->vfs_aio_state.duration = nsec_time_diff(&end, &state->start);
 704
 705         /*
 706          * Write the state pointer to glusterfs_aio_state to the
 707          * pipe, so we can call tevent_req_done() from the main thread,
 708          * because tevent_req_done() is not designed to be executed in
 709          * the multithread environment, so tevent_req_done() must be
 710          * executed from the smbd main thread.
 711          *
 712          * write(2) on pipes with sizes under _POSIX_PIPE_BUF
 713          * in size is atomic, without this, the use op pipes in this
 714          * code would not work.
 715          *
 716          * sys_write is a thin enough wrapper around write(2)
 717          * that we can trust it here.
 718          */
 719
 720         sts = sys_write(write_fd, &state, sizeof(struct glusterfs_aio_state *));
 721         if (sts < 0) {
 722                 DEBUG(0,("\nWrite to pipe failed (%s)", strerror(errno)));
 723         }
 724
 725         return;
 726 }
 727
 728 /*
 729  * Read each req off the pipe and process it.
 730  */
 731 static void aio_tevent_fd_done(struct tevent_context *event_ctx,
 732                                 struct tevent_fd *fde,
 733                                 uint16_t flags, void *data)
 734 {
 735         struct tevent_req *req = NULL;
 736         struct glusterfs_aio_state *state = NULL;
 737         int sts = 0;
 738
 739         /*
 740          * read(2) on pipes is atomic if the needed data is available
 741          * in the pipe, per SUS and POSIX.  Because we always write
 742          * to the pipe in sizeof(struct tevent_req *) chunks, we can
 743          * always read in those chunks, atomically.
 744          *
 745          * sys_read is a thin enough wrapper around read(2) that we
 746          * can trust it here.
 747          */
 748
 749         sts = sys_read(read_fd, &state, sizeof(struct glusterfs_aio_state *));
 750
 751         if (sts < 0) {
 752                 DEBUG(0,("\nRead from pipe failed (%s)", strerror(errno)));
 753         }
 754
 755         /* if we've cancelled the op, there is no req, so just clean up. */
 756         if (state->cancelled == true) {
 757                 TALLOC_FREE(state);
 758                 return;
 759         }
 760
 761         req = state->req;
 762
 763         if (req) {
 764                 tevent_req_done(req);
 765         }
 766         return;
 767 }
 768
 769 static bool init_gluster_aio(struct vfs_handle_struct *handle)
 770 {
 771         int fds[2];
 772         int ret = -1;
 773
 774         if (read_fd != -1) {
 775                 /*
 776                  * Already initialized.
 777                  */
 778                 return true;
 779         }
 780
 781         ret = pipe(fds);
 782         if (ret == -1) {
 783                 goto fail;
 784         }
 785
 786         read_fd = fds[0];
 787         write_fd = fds[1];
 788
 789         aio_read_event = tevent_add_fd(handle->conn->sconn->ev_ctx,
 790                                         NULL,
 791                                         read_fd,
 792                                         TEVENT_FD_READ,
 793                                         aio_tevent_fd_done,
 794                                         NULL);
 795         if (aio_read_event == NULL) {
 796                 goto fail;
 797         }
 798
 799         return true;
 800 fail:
 801         TALLOC_FREE(aio_read_event);
 802         if (read_fd != -1) {
 803                 close(read_fd);
 804                 close(write_fd);
 805                 read_fd = -1;
 806                 write_fd = -1;
 807         }
 808         return false;
 809 }
 810
 811 static struct glusterfs_aio_state *aio_state_create(TALLOC_CTX *mem_ctx)
 812 {
 813         struct tevent_req *req = NULL;
 814         struct glusterfs_aio_state *state = NULL;
 815         struct glusterfs_aio_wrapper *wrapper = NULL;
 816
 817         req = tevent_req_create(mem_ctx, &wrapper, struct glusterfs_aio_wrapper);
 818
 819         if (req == NULL) {
 820                 return NULL;
 821         }
 822
 823         state = talloc_zero(NULL, struct glusterfs_aio_state);
 824
 825         if (state == NULL) {
 826                 TALLOC_FREE(req);
 827                 return NULL;
 828         }
 829
 830         talloc_set_destructor(wrapper, aio_wrapper_destructor);
 831         state->cancelled = false;
 832         state->req = req;
 833
 834         wrapper->state = state;
 835
 836         return state;
 837 }
 838
 839 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 840                                                   *handle, TALLOC_CTX *mem_ctx,
 841                                                   struct tevent_context *ev,
 842                                                   files_struct *fsp,
 843                                                   void *data, size_t n,
 844                                                   off_t offset)
 845 {
 846         struct glusterfs_aio_state *state = NULL;
 847         struct tevent_req *req = NULL;
 848         int ret = 0;
 849         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 850
 851         if (glfd == NULL) {
 852                 DBG_ERR("Failed to fetch gluster fd\n");
 853                 return NULL;
 854         }
 855
 856         state = aio_state_create(mem_ctx);
 857
 858         if (state == NULL) {
 859                 return NULL;
 860         }
 861
 862         req = state->req;
 863
 864         if (!init_gluster_aio(handle)) {
 865                 tevent_req_error(req, EIO);
 866                 return tevent_req_post(req, ev);
 867         }
 868
 869         /*
 870          * aio_glusterfs_done and aio_tevent_fd_done()
 871          * use the raw tevent context. We need to use
 872          * tevent_req_defer_callback() in order to
 873          * use the event context we're started with.
 874          */
 875         tevent_req_defer_callback(req, ev);
 876
 877         PROFILE_TIMESTAMP(&state->start);
 878         ret = glfs_pread_async(glfd, data, n, offset, 0, aio_glusterfs_done,
 879                                 state);
 880         if (ret < 0) {
 881                 tevent_req_error(req, -ret);
 882                 return tevent_req_post(req, ev);
 883         }
 884
 885         return req;
 886 }
 887
 888 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 889                                                   *handle, TALLOC_CTX *mem_ctx,
 890                                                   struct tevent_context *ev,
 891                                                   files_struct *fsp,
 892                                                   const void *data, size_t n,
 893                                                   off_t offset)
 894 {
 895         struct glusterfs_aio_state *state = NULL;
 896         struct tevent_req *req = NULL;
 897         int ret = 0;
 898         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 899
 900         if (glfd == NULL) {
 901                 DBG_ERR("Failed to fetch gluster fd\n");
 902                 return NULL;
 903         }
 904
 905         state = aio_state_create(mem_ctx);
 906
 907         if (state == NULL) {
 908                 return NULL;
 909         }
 910
 911         req = state->req;
 912
 913         if (!init_gluster_aio(handle)) {
 914                 tevent_req_error(req, EIO);
 915                 return tevent_req_post(req, ev);
 916         }
 917
 918         /*
 919          * aio_glusterfs_done and aio_tevent_fd_done()
 920          * use the raw tevent context. We need to use
 921          * tevent_req_defer_callback() in order to
 922          * use the event context we're started with.
 923          */
 924         tevent_req_defer_callback(req, ev);
 925
 926         PROFILE_TIMESTAMP(&state->start);
 927         ret = glfs_pwrite_async(glfd, data, n, offset, 0, aio_glusterfs_done,
 928                                 state);
 929         if (ret < 0) {
 930                 tevent_req_error(req, -ret);
 931                 return tevent_req_post(req, ev);
 932         }
 933
 934         return req;
 935 }
 936
 937 static ssize_t vfs_gluster_recv(struct tevent_req *req,
 938                                 struct vfs_aio_state *vfs_aio_state)
 939 {
 940         struct glusterfs_aio_wrapper *wrapper = NULL;
 941         int ret = 0;
 942
 943         wrapper = tevent_req_data(req, struct glusterfs_aio_wrapper);
 944
 945         if (wrapper == NULL) {
 946                 return -1;
 947         }
 948
 949         if (wrapper->state == NULL) {
 950                 return -1;
 951         }
 952
 953         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 954                 return -1;
 955         }
 956
 957         *vfs_aio_state = wrapper->state->vfs_aio_state;
 958         ret = wrapper->state->ret;
 959
 960         /* Clean up the state, it is in a NULL context. */
 961
 962         TALLOC_FREE(wrapper->state);
 963
 964         return ret;
 965 }
 966
 967 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
 968                                   files_struct *fsp, const void *data,
 969                                   size_t n, off_t offset)
 970 {
 971         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 972         if (glfd == NULL) {
 973                 DBG_ERR("Failed to fetch gluster fd\n");
 974                 return -1;
 975         }
 976
 977 #ifdef HAVE_GFAPI_VER_7_6
 978         return glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
 979 #else
 980         return glfs_pwrite(glfd, data, n, offset, 0);
 981 #endif
 982 }
 983
 984 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
 985                                files_struct *fsp, off_t offset, int whence)
 986 {
 987         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 988         if (glfd == NULL) {
 989                 DBG_ERR("Failed to fetch gluster fd\n");
 990                 return -1;
 991         }
 992
 993         return glfs_lseek(glfd, offset, whence);
 994 }
 995
 996 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
 997                                     files_struct *fromfsp,
 998                                     const DATA_BLOB *hdr,
 999                                     off_t offset, size_t n)
1000 {
1001         errno = ENOTSUP;
1002         return -1;
1003 }
1004
1005 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1006                                     int fromfd, files_struct *tofsp,
1007                                     off_t offset, size_t n)
1008 {
1009         errno = ENOTSUP;
1010         return -1;
1011 }
1012
1013 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
1014                               const struct smb_filename *smb_fname_src,
1015                               const struct smb_filename *smb_fname_dst)
1016 {
1017         return glfs_rename(handle->data, smb_fname_src->base_name,
1018                            smb_fname_dst->base_name);
1019 }
1020
1021 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1022                                                  *handle, TALLOC_CTX *mem_ctx,
1023                                                  struct tevent_context *ev,
1024                                                  files_struct *fsp)
1025 {
1026         struct tevent_req *req = NULL;
1027         struct glusterfs_aio_state *state = NULL;
1028         int ret = 0;
1029         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1030
1031         if (glfd == NULL) {
1032                 DBG_ERR("Failed to fetch gluster fd\n");
1033                 return NULL;
1034         }
1035
1036         state = aio_state_create(mem_ctx);
1037
1038         if (state == NULL) {
1039                 return NULL;
1040         }
1041
1042         req = state->req;
1043
1044         if (!init_gluster_aio(handle)) {
1045                 tevent_req_error(req, EIO);
1046                 return tevent_req_post(req, ev);
1047         }
1048
1049         /*
1050          * aio_glusterfs_done and aio_tevent_fd_done()
1051          * use the raw tevent context. We need to use
1052          * tevent_req_defer_callback() in order to
1053          * use the event context we're started with.
1054          */
1055         tevent_req_defer_callback(req, ev);
1056
1057         PROFILE_TIMESTAMP(&state->start);
1058         ret = glfs_fsync_async(glfd, aio_glusterfs_done, state);
1059         if (ret < 0) {
1060                 tevent_req_error(req, -ret);
1061                 return tevent_req_post(req, ev);
1062         }
1063         return req;
1064 }
1065
1066 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1067                                   struct vfs_aio_state *vfs_aio_state)
1068 {
1069         /*
1070          * Use implicit conversion ssize_t->int
1071          */
1072         return vfs_gluster_recv(req, vfs_aio_state);
1073 }
1074
1075 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1076                             struct smb_filename *smb_fname)
1077 {
1078         struct stat st;
1079         int ret;
1080
1081         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1082         if (ret == 0) {
1083                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1084         }
1085         if (ret < 0 && errno != ENOENT) {
1086                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1087                           smb_fname->base_name, strerror(errno)));
1088         }
1089         return ret;
1090 }
1091
1092 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1093                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1094 {
1095         struct stat st;
1096         int ret;
1097         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1098
1099         if (glfd == NULL) {
1100                 DBG_ERR("Failed to fetch gluster fd\n");
1101                 return -1;
1102         }
1103
1104         ret = glfs_fstat(glfd, &st);
1105         if (ret == 0) {
1106                 smb_stat_ex_from_stat(sbuf, &st);
1107         }
1108         if (ret < 0) {
1109                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1110                           fsp->fh->fd, strerror(errno)));
1111         }
1112         return ret;
1113 }
1114
1115 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1116                              struct smb_filename *smb_fname)
1117 {
1118         struct stat st;
1119         int ret;
1120
1121         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1122         if (ret == 0) {
1123                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1124         }
1125         if (ret < 0 && errno != ENOENT) {
1126                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1127                           smb_fname->base_name, strerror(errno)));
1128         }
1129         return ret;
1130 }
1131
1132 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1133                                            files_struct *fsp,
1134                                            const SMB_STRUCT_STAT *sbuf)
1135 {
1136         return sbuf->st_ex_blocks * 512;
1137 }
1138
1139 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
1140                               const struct smb_filename *smb_fname)
1141 {
1142         return glfs_unlink(handle->data, smb_fname->base_name);
1143 }
1144
1145 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1146                                 const struct smb_filename *smb_fname,
1147                                 mode_t mode)
1148 {
1149         return glfs_chmod(handle->data, smb_fname->base_name, mode);
1150 }
1151
1152 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1153                               files_struct *fsp, mode_t mode)
1154 {
1155         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1156
1157         if (glfd == NULL) {
1158                 DBG_ERR("Failed to fetch gluster fd\n");
1159                 return -1;
1160         }
1161
1162         return glfs_fchmod(glfd, mode);
1163 }
1164
1165 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
1166                         const struct smb_filename *smb_fname,
1167                         uid_t uid,
1168                         gid_t gid)
1169 {
1170         return glfs_chown(handle->data, smb_fname->base_name, uid, gid);
1171 }
1172
1173 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1174                               files_struct *fsp, uid_t uid, gid_t gid)
1175 {
1176         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1177         if (glfd == NULL) {
1178                 DBG_ERR("Failed to fetch gluster fd\n");
1179                 return -1;
1180         }
1181
1182         return glfs_fchown(glfd, uid, gid);
1183 }
1184
1185 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1186                         const struct smb_filename *smb_fname,
1187                         uid_t uid,
1188                         gid_t gid)
1189 {
1190         return glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1191 }
1192
1193 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1194                         const struct smb_filename *smb_fname)
1195 {
1196         return glfs_chdir(handle->data, smb_fname->base_name);
1197 }
1198
1199 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1200                                 TALLOC_CTX *ctx)
1201 {
1202         char *cwd;
1203         char *ret;
1204         struct smb_filename *smb_fname = NULL;
1205
1206         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1207         if (cwd == NULL) {
1208                 return NULL;
1209         }
1210
1211         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1212         if (ret == NULL) {
1213                 SAFE_FREE(cwd);
1214                 return NULL;
1215         }
1216         smb_fname = synthetic_smb_fname(ctx,
1217                                         ret,
1218                                         NULL,
1219                                         NULL,
1220                                         0);
1221         SAFE_FREE(cwd);
1222         return smb_fname;
1223 }
1224
1225 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1226                               const struct smb_filename *smb_fname,
1227                               struct smb_file_time *ft)
1228 {
1229         struct timespec times[2];
1230
1231         if (null_timespec(ft->atime)) {
1232                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1233                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1234         } else {
1235                 times[0].tv_sec = ft->atime.tv_sec;
1236                 times[0].tv_nsec = ft->atime.tv_nsec;
1237         }
1238
1239         if (null_timespec(ft->mtime)) {
1240                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1241                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1242         } else {
1243                 times[1].tv_sec = ft->mtime.tv_sec;
1244                 times[1].tv_nsec = ft->mtime.tv_nsec;
1245         }
1246
1247         if ((timespec_compare(&times[0],
1248                               &smb_fname->st.st_ex_atime) == 0) &&
1249             (timespec_compare(&times[1],
1250                               &smb_fname->st.st_ex_mtime) == 0)) {
1251                 return 0;
1252         }
1253
1254         return glfs_utimens(handle->data, smb_fname->base_name, times);
1255 }
1256
1257 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1258                                  files_struct *fsp, off_t offset)
1259 {
1260         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1261         if (glfd == NULL) {
1262                 DBG_ERR("Failed to fetch gluster fd\n");
1263                 return -1;
1264         }
1265
1266 #ifdef HAVE_GFAPI_VER_7_6
1267         return glfs_ftruncate(glfd, offset, NULL, NULL);
1268 #else
1269         return glfs_ftruncate(glfd, offset);
1270 #endif
1271 }
1272
1273 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1274                                  struct files_struct *fsp,
1275                                  uint32_t mode,
1276                                  off_t offset, off_t len)
1277 {
1278 #ifdef HAVE_GFAPI_VER_6
1279         int keep_size, punch_hole;
1280         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1281         if (glfd == NULL) {
1282                 DBG_ERR("Failed to fetch gluster fd\n");
1283                 return -1;
1284         }
1285
1286         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1287         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1288
1289         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1290         if (mode != 0) {
1291                 errno = ENOTSUP;
1292                 return -1;
1293         }
1294
1295         if (punch_hole) {
1296                 return glfs_discard(glfd, offset, len);
1297         }
1298
1299         return glfs_fallocate(glfd, keep_size, offset, len);
1300 #else
1301         errno = ENOTSUP;
1302         return -1;
1303 #endif
1304 }
1305
1306 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1307                                 TALLOC_CTX *ctx,
1308                                 const struct smb_filename *smb_fname)
1309 {
1310         char *result = NULL;
1311         struct smb_filename *result_fname = NULL;
1312         char *resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1313
1314         if (resolved_path == NULL) {
1315                 errno = ENOMEM;
1316                 return NULL;
1317         }
1318
1319         result = glfs_realpath(handle->data,
1320                         smb_fname->base_name,
1321                         resolved_path);
1322         if (result != NULL) {
1323                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
1324         }
1325
1326         SAFE_FREE(resolved_path);
1327         return result_fname;
1328 }
1329
1330 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1331                              files_struct *fsp, int op, off_t offset,
1332                              off_t count, int type)
1333 {
1334         struct flock flock = { 0, };
1335         int ret;
1336         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1337         if (glfd == NULL) {
1338                 DBG_ERR("Failed to fetch gluster fd\n");
1339                 return false;
1340         }
1341
1342         flock.l_type = type;
1343         flock.l_whence = SEEK_SET;
1344         flock.l_start = offset;
1345         flock.l_len = count;
1346         flock.l_pid = 0;
1347
1348         ret = glfs_posix_lock(glfd, op, &flock);
1349
1350         if (op == F_GETLK) {
1351                 /* lock query, true if someone else has locked */
1352                 if ((ret != -1) &&
1353                     (flock.l_type != F_UNLCK) &&
1354                     (flock.l_pid != 0) && (flock.l_pid != getpid()))
1355                         return true;
1356                 /* not me */
1357                 return false;
1358         }
1359
1360         if (ret == -1) {
1361                 return false;
1362         }
1363
1364         return true;
1365 }
1366
1367 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1368                                     files_struct *fsp, uint32_t share_mode,
1369                                     uint32_t access_mask)
1370 {
1371         errno = ENOSYS;
1372         return -1;
1373 }
1374
1375 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1376                                       files_struct *fsp, int leasetype)
1377 {
1378         errno = ENOSYS;
1379         return -1;
1380 }
1381
1382 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1383                                 files_struct *fsp, off_t *poffset,
1384                                 off_t *pcount, int *ptype, pid_t *ppid)
1385 {
1386         struct flock flock = { 0, };
1387         int ret;
1388         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1389         if (glfd == NULL) {
1390                 DBG_ERR("Failed to fetch gluster fd\n");
1391                 return false;
1392         }
1393
1394         flock.l_type = *ptype;
1395         flock.l_whence = SEEK_SET;
1396         flock.l_start = *poffset;
1397         flock.l_len = *pcount;
1398         flock.l_pid = 0;
1399
1400         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1401
1402         if (ret == -1) {
1403                 return false;
1404         }
1405
1406         *ptype = flock.l_type;
1407         *poffset = flock.l_start;
1408         *pcount = flock.l_len;
1409         *ppid = flock.l_pid;
1410
1411         return true;
1412 }
1413
1414 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
1415                                 const char *link_target,
1416                                 const struct smb_filename *new_smb_fname)
1417 {
1418         return glfs_symlink(handle->data,
1419                         link_target,
1420                         new_smb_fname->base_name);
1421 }
1422
1423 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
1424                                 const struct smb_filename *smb_fname,
1425                                 char *buf,
1426                                 size_t bufsiz)
1427 {
1428         return glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1429 }
1430
1431 static int vfs_gluster_link(struct vfs_handle_struct *handle,
1432                                 const struct smb_filename *old_smb_fname,
1433                                 const struct smb_filename *new_smb_fname)
1434 {
1435         return glfs_link(handle->data,
1436                         old_smb_fname->base_name,
1437                         new_smb_fname->base_name);
1438 }
1439
1440 static int vfs_gluster_mknod(struct vfs_handle_struct *handle,
1441                                 const struct smb_filename *smb_fname,
1442                                 mode_t mode,
1443                                 SMB_DEV_T dev)
1444 {
1445         return glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1446 }
1447
1448 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1449                                 const struct smb_filename *smb_fname,
1450                                 unsigned int flags)
1451 {
1452         errno = ENOSYS;
1453         return -1;
1454 }
1455
1456 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1457                                          const char *path, const char *name,
1458                                          TALLOC_CTX *mem_ctx, char **found_name)
1459 {
1460         int ret;
1461         char key_buf[GLUSTER_NAME_MAX + 64];
1462         char val_buf[GLUSTER_NAME_MAX + 1];
1463
1464         if (strlen(name) >= GLUSTER_NAME_MAX) {
1465                 errno = ENAMETOOLONG;
1466                 return -1;
1467         }
1468
1469         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1470                  "glusterfs.get_real_filename:%s", name);
1471
1472         ret = glfs_getxattr(handle->data, path, key_buf, val_buf,
1473                             GLUSTER_NAME_MAX + 1);
1474         if (ret == -1) {
1475                 if (errno == ENOATTR) {
1476                         errno = EOPNOTSUPP;
1477                 }
1478                 return -1;
1479         }
1480
1481         *found_name = talloc_strdup(mem_ctx, val_buf);
1482         if (found_name[0] == NULL) {
1483                 errno = ENOMEM;
1484                 return -1;
1485         }
1486         return 0;
1487 }
1488
1489 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1490                                 const struct smb_filename *smb_fname)
1491 {
1492         return handle->conn->connectpath;
1493 }
1494
1495 /* EA Operations */
1496
1497 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1498                                 const struct smb_filename *smb_fname,
1499                                 const char *name,
1500                                 void *value,
1501                                 size_t size)
1502 {
1503         return glfs_getxattr(handle->data, smb_fname->base_name,
1504                         name, value, size);
1505 }
1506
1507 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1508                                      files_struct *fsp, const char *name,
1509                                      void *value, size_t size)
1510 {
1511         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1512         if (glfd == NULL) {
1513                 DBG_ERR("Failed to fetch gluster fd\n");
1514                 return -1;
1515         }
1516
1517         return glfs_fgetxattr(glfd, name, value, size);
1518 }
1519
1520 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1521                                 const struct smb_filename *smb_fname,
1522                                 char *list,
1523                                 size_t size)
1524 {
1525         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1526 }
1527
1528 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1529                                       files_struct *fsp, char *list,
1530                                       size_t size)
1531 {
1532         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1533         if (glfd == NULL) {
1534                 DBG_ERR("Failed to fetch gluster fd\n");
1535                 return -1;
1536         }
1537
1538         return glfs_flistxattr(glfd, list, size);
1539 }
1540
1541 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1542                                 const struct smb_filename *smb_fname,
1543                                 const char *name)
1544 {
1545         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1546 }
1547
1548 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1549                                     files_struct *fsp, const char *name)
1550 {
1551         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1552         if (glfd == NULL) {
1553                 DBG_ERR("Failed to fetch gluster fd\n");
1554                 return -1;
1555         }
1556
1557         return glfs_fremovexattr(glfd, name);
1558 }
1559
1560 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1561                                 const struct smb_filename *smb_fname,
1562                                 const char *name,
1563                                 const void *value, size_t size, int flags)
1564 {
1565         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1566 }
1567
1568 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1569                                  files_struct *fsp, const char *name,
1570                                  const void *value, size_t size, int flags)
1571 {
1572         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1573         if (glfd == NULL) {
1574                 DBG_ERR("Failed to fetch gluster fd\n");
1575                 return -1;
1576         }
1577
1578         return glfs_fsetxattr(glfd, name, value, size, flags);
1579 }
1580
1581 /* AIO Operations */
1582
1583 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1584                                   files_struct *fsp)
1585 {
1586         return false;
1587 }
1588
1589 static struct vfs_fn_pointers glusterfs_fns = {
1590
1591         /* Disk Operations */
1592
1593         .connect_fn = vfs_gluster_connect,
1594         .disconnect_fn = vfs_gluster_disconnect,
1595         .disk_free_fn = vfs_gluster_disk_free,
1596         .get_quota_fn = vfs_gluster_get_quota,
1597         .set_quota_fn = vfs_gluster_set_quota,
1598         .statvfs_fn = vfs_gluster_statvfs,
1599         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1600
1601         .get_dfs_referrals_fn = NULL,
1602
1603         /* Directory Operations */
1604
1605         .opendir_fn = vfs_gluster_opendir,
1606         .fdopendir_fn = vfs_gluster_fdopendir,
1607         .readdir_fn = vfs_gluster_readdir,
1608         .seekdir_fn = vfs_gluster_seekdir,
1609         .telldir_fn = vfs_gluster_telldir,
1610         .rewind_dir_fn = vfs_gluster_rewinddir,
1611         .mkdir_fn = vfs_gluster_mkdir,
1612         .rmdir_fn = vfs_gluster_rmdir,
1613         .closedir_fn = vfs_gluster_closedir,
1614
1615         /* File Operations */
1616
1617         .open_fn = vfs_gluster_open,
1618         .create_file_fn = NULL,
1619         .close_fn = vfs_gluster_close,
1620         .pread_fn = vfs_gluster_pread,
1621         .pread_send_fn = vfs_gluster_pread_send,
1622         .pread_recv_fn = vfs_gluster_recv,
1623         .pwrite_fn = vfs_gluster_pwrite,
1624         .pwrite_send_fn = vfs_gluster_pwrite_send,
1625         .pwrite_recv_fn = vfs_gluster_recv,
1626         .lseek_fn = vfs_gluster_lseek,
1627         .sendfile_fn = vfs_gluster_sendfile,
1628         .recvfile_fn = vfs_gluster_recvfile,
1629         .rename_fn = vfs_gluster_rename,
1630         .fsync_send_fn = vfs_gluster_fsync_send,
1631         .fsync_recv_fn = vfs_gluster_fsync_recv,
1632
1633         .stat_fn = vfs_gluster_stat,
1634         .fstat_fn = vfs_gluster_fstat,
1635         .lstat_fn = vfs_gluster_lstat,
1636         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1637         .unlink_fn = vfs_gluster_unlink,
1638
1639         .chmod_fn = vfs_gluster_chmod,
1640         .fchmod_fn = vfs_gluster_fchmod,
1641         .chown_fn = vfs_gluster_chown,
1642         .fchown_fn = vfs_gluster_fchown,
1643         .lchown_fn = vfs_gluster_lchown,
1644         .chdir_fn = vfs_gluster_chdir,
1645         .getwd_fn = vfs_gluster_getwd,
1646         .ntimes_fn = vfs_gluster_ntimes,
1647         .ftruncate_fn = vfs_gluster_ftruncate,
1648         .fallocate_fn = vfs_gluster_fallocate,
1649         .lock_fn = vfs_gluster_lock,
1650         .kernel_flock_fn = vfs_gluster_kernel_flock,
1651         .linux_setlease_fn = vfs_gluster_linux_setlease,
1652         .getlock_fn = vfs_gluster_getlock,
1653         .symlink_fn = vfs_gluster_symlink,
1654         .readlink_fn = vfs_gluster_readlink,
1655         .link_fn = vfs_gluster_link,
1656         .mknod_fn = vfs_gluster_mknod,
1657         .realpath_fn = vfs_gluster_realpath,
1658         .chflags_fn = vfs_gluster_chflags,
1659         .file_id_create_fn = NULL,
1660         .streaminfo_fn = NULL,
1661         .get_real_filename_fn = vfs_gluster_get_real_filename,
1662         .connectpath_fn = vfs_gluster_connectpath,
1663
1664         .brl_lock_windows_fn = NULL,
1665         .brl_unlock_windows_fn = NULL,
1666         .strict_lock_check_fn = NULL,
1667         .translate_name_fn = NULL,
1668         .fsctl_fn = NULL,
1669
1670         /* NT ACL Operations */
1671         .fget_nt_acl_fn = NULL,
1672         .get_nt_acl_fn = NULL,
1673         .fset_nt_acl_fn = NULL,
1674         .audit_file_fn = NULL,
1675
1676         /* Posix ACL Operations */
1677         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
1678         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
1679         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1680         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1681         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
1682         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
1683         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
1684
1685         /* EA Operations */
1686         .getxattr_fn = vfs_gluster_getxattr,
1687         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
1688         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
1689         .fgetxattr_fn = vfs_gluster_fgetxattr,
1690         .listxattr_fn = vfs_gluster_listxattr,
1691         .flistxattr_fn = vfs_gluster_flistxattr,
1692         .removexattr_fn = vfs_gluster_removexattr,
1693         .fremovexattr_fn = vfs_gluster_fremovexattr,
1694         .setxattr_fn = vfs_gluster_setxattr,
1695         .fsetxattr_fn = vfs_gluster_fsetxattr,
1696
1697         /* AIO Operations */
1698         .aio_force_fn = vfs_gluster_aio_force,
1699
1700         /* Durable handle Operations */
1701         .durable_cookie_fn = NULL,
1702         .durable_disconnect_fn = NULL,
1703         .durable_reconnect_fn = NULL,
1704 };
1705
1706 static_decl_vfs;
1707 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
1708 {
1709         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1710                                 "glusterfs", &glusterfs_fns);
1711 }